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 Post subject: Repressurise CH?
PostPosted: Wed May 16, 2018 7:49 am 
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Dear Forum Members

I was hoping to get some advise for my heating system at home. I am a DIY hobbyist and haven’t my experience with central heating systems so please bear with me.

A couple of weeks ago I was woken up by a noise from my airing cupboard. It was coming from a CH Dab Evosta pump due to CH starting to heat up the house in the morning. I went through quick bleeding procedure and seemed to have fix the issue. On the same day I started my en-suite renovation which included taking radiator off the circuit. I did this by shutting off the radiator valves and taking off the radiator. Since that happened our central heating stopped working. I assumed it was because I broke the water circuit however now that I finished the renovation and reinstalled the radiator CH does not work but hot water does. I tried bleeding the newly installed radiator and a lot of air was released but no water was coming out.

I also noticed that the DAB pump is running quite quietly, as if it was not working very hard. The light on my Worcester 24Ri stays solid blue but ignition light does not come on when thermostat calls for heat.

I suspect the pressure in the CH is too low but I can’t find any gauges near the boiler. I have attached pictures of my setup.

Have you any suggestions what I could do to fix the issue? I’d love to be able to do it myself as much as it can be done.

Thanks in advance for your help.

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 Post subject: Re: Repressurise CH?
PostPosted: Wed May 16, 2018 8:11 am 
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Somewhere there should be a short silver flexible pipe, a shorter version of the long one in the last picture, with a valve at each end.

That long one, I assume, will be connected to a white expansion vessel?

This will be the filling loop. Have a look anywhere a cold mains pipe might run.

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 Post subject: Re: Repressurise CH?
PostPosted: Wed May 16, 2018 9:29 am 
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gas4you wrote:
Somewhere there should be a short silver flexible pipe, a shorter version of the long one in the last picture, with a valve at each end.

That long one, I assume, will be connected to a white expansion vessel?

This will be the filling loop. Have a look anywhere a cold mains pipe might run.


Thanks for the response @gas4you. I will look for a hose again but initial search produced no results. I also think I have two circuits. One for main central heating and one for towel rails in the bathrooms. The towel rails are empty with no water but main central heating radiators had no air in them when I tried to bleed them yesterday.

I’ll try to find the hose tonight - am I right in thinking there should be a pressure gauge somewhere?


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 Post subject: Re: Repressurise CH?
PostPosted: Wed May 16, 2018 12:24 pm 
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Yes, I would have thought so

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